This SCP would be a picture with a clock on it. The clock would have roman numerals and the background would be white. Upon physical contact with the painting, the person has the ability to enter it. Upon entering, the person would see a staircase leading up to a big clock with roman numerals. For the time they stay in there, they will be allowed to 'add' to their life. If hurt or shot afterwards, their body will fall, but a sort of spark happens and a duplicate of themselves will reappears. Just something I thought up of just a few minutes ago. Tell me if it's 10% Crit Rate or not.

Idea for an angle: The person is essentially a clone right? Make it so that the body doesn't disappear. Someone 'revived' by this SCP stumbles onto their own corpse and starts to wonder if the person leaving the painting is actually the real person, or just a copy that thinks it's the original.

That's a cool idea, actually. When they leave the painting and die, they wonder whose corpse it is. I've also had an idea to remove to +10% Crit rate: If you die, after you're revived, you have the time you spent in the alternate dimension left to live. However, I might have to come up with a new SCP.